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Real Estate and Intangible Assets - Summary Information of Thirty-Four Farms (Detail) (USD $) | 0 Months Ended | 3 Months Ended | 0 Months Ended
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Mar. 31, 2015 Farm acre | Mar. 31, 2015 Farm acre | Mar. 31, 2014 Farm acre | Feb. 09, 2015 | Feb. 23, 2015
Real Estate Properties [Line Items] |  |  |  |  |
Number of Farms | 34 land_NumberOfRealEstateFarms | 34 land_NumberOfRealEstateFarms | 21 land_NumberOfRealEstateFarms |  |
Total Acres | 8,789 us-gaap_AreaOfRealEstateProperty | 8,789 us-gaap_AreaOfRealEstateProperty | 6,000 us-gaap_AreaOfRealEstateProperty |  |
Farm Acres | 7,185 land_FarmableAreaOfLand | 7,185 land_FarmableAreaOfLand |  |  |
Net Cost Basis | $ 166,054,114 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet | $ 166,054,114 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet |  |  |
Encumbrances | 106,666,803 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances | 106,666,803 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances |  |  |
San Andreas [Member] | Watsonville, CA [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Jun. 16, 1997 |  |  |
Number of Farms |  | 1 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_SanAndreasMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Total Acres | 307 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_SanAndreasMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember | 307 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_SanAndreasMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Farm Acres | 238 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_SanAndreasMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember | 238 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_SanAndreasMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Lease Expiration Date |  | Dec. 31, 2020 |  |  |
Net Cost Basis | 4,816,348 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_SanAndreasMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember | 4,816,348 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_SanAndreasMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Encumbrances | 4,602,937 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_SanAndreasMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember | 4,602,937 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_SanAndreasMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
West Gonzales [Member] | Oxnard, CA [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Sep. 15, 1998 |  |  |
Number of Farms |  | 1 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_WestGonzalesMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Total Acres | 653 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_WestGonzalesMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember | 653 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_WestGonzalesMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Farm Acres | 502 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_WestGonzalesMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember | 502 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_WestGonzalesMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Lease Expiration Date |  | Jun. 30, 2020 |  |  |
Net Cost Basis | 12,365,304 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_WestGonzalesMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember | 12,365,304 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_WestGonzalesMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Encumbrances | 23,418,424 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_WestGonzalesMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember | 23,418,424 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_WestGonzalesMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
West Beach [Member] | Watsonville, CA [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Jan. 03, 2011 |  |  |
Number of Farms |  | 3 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_WestBeachMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Total Acres | 196 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_WestBeachMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember | 196 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_WestBeachMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Farm Acres | 195 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_WestBeachMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember | 195 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_WestBeachMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Lease Expiration Date |  | Dec. 31, 2023 |  |  |
Net Cost Basis | 9,165,426 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_WestBeachMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember | 9,165,426 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_WestBeachMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Encumbrances | 4,483,895 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_WestBeachMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember | 4,483,895 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_WestBeachMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Dalton Lane [Member] | Watsonville, CA [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Jul. 07, 2011 |  |  |
Number of Farms |  | 1 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_DaltonLaneMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Total Acres | 72 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_DaltonLaneMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember | 72 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_DaltonLaneMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Farm Acres | 70 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_DaltonLaneMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember | 70 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_DaltonLaneMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Lease Expiration Date |  | Nov. 01, 2015 |  |  |
Net Cost Basis | 2,693,926 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_DaltonLaneMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember | 2,693,926 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_DaltonLaneMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Encumbrances | 1,485,638 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_DaltonLaneMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember | 1,485,638 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_DaltonLaneMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Keysville Road [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Lease Expiration Date |  |  |  | Jun. 30, 2020 |
Keysville Road [Member] | Plant City, FL [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Oct. 26, 2011 |  |  |
Number of Farms |  | 2 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_KeysvilleRoadMember / us-gaap_StatementGeographicalAxis = land_PlantCityFlMember |  |  |
Total Acres | 59 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_KeysvilleRoadMember / us-gaap_StatementGeographicalAxis = land_PlantCityFlMember | 59 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_KeysvilleRoadMember / us-gaap_StatementGeographicalAxis = land_PlantCityFlMember |  |  |
Farm Acres | 56 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_KeysvilleRoadMember / us-gaap_StatementGeographicalAxis = land_PlantCityFlMember | 56 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_KeysvilleRoadMember / us-gaap_StatementGeographicalAxis = land_PlantCityFlMember |  |  |
Lease Expiration Date |  | Jun. 30, 2020 |  |  |
Net Cost Basis | 1,241,700 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_KeysvilleRoadMember / us-gaap_StatementGeographicalAxis = land_PlantCityFlMember | 1,241,700 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_KeysvilleRoadMember / us-gaap_StatementGeographicalAxis = land_PlantCityFlMember |  |  |
Colding Loop [Member] | Wimauma, FL [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Aug. 09, 2012 |  |  |
Number of Farms |  | 1 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_ColdingLoopMember / us-gaap_StatementGeographicalAxis = land_WimaumaFlMember |  |  |
Total Acres | 219 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_ColdingLoopMember / us-gaap_StatementGeographicalAxis = land_WimaumaFlMember | 219 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_ColdingLoopMember / us-gaap_StatementGeographicalAxis = land_WimaumaFlMember |  |  |
Farm Acres | 181 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_ColdingLoopMember / us-gaap_StatementGeographicalAxis = land_WimaumaFlMember | 181 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_ColdingLoopMember / us-gaap_StatementGeographicalAxis = land_WimaumaFlMember |  |  |
Lease Expiration Date |  | Jun. 14, 2018 |  |  |
Net Cost Basis | 4,029,515 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_ColdingLoopMember / us-gaap_StatementGeographicalAxis = land_WimaumaFlMember | 4,029,515 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_ColdingLoopMember / us-gaap_StatementGeographicalAxis = land_WimaumaFlMember |  |  |
Trapnell Road [Member] | Plant City, FL [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Sep. 12, 2012 |  |  |
Number of Farms |  | 3 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_TrapnellRoadMember / us-gaap_StatementGeographicalAxis = land_PlantCityFlMember |  |  |
Total Acres | 124 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_TrapnellRoadMember / us-gaap_StatementGeographicalAxis = land_PlantCityFlMember | 124 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_TrapnellRoadMember / us-gaap_StatementGeographicalAxis = land_PlantCityFlMember |  |  |
Farm Acres | 110 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_TrapnellRoadMember / us-gaap_StatementGeographicalAxis = land_PlantCityFlMember | 110 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_TrapnellRoadMember / us-gaap_StatementGeographicalAxis = land_PlantCityFlMember |  |  |
Lease Expiration Date |  | Jun. 30, 2017 |  |  |
Net Cost Basis | 4,065,630 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_TrapnellRoadMember / us-gaap_StatementGeographicalAxis = land_PlantCityFlMember | 4,065,630 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_TrapnellRoadMember / us-gaap_StatementGeographicalAxis = land_PlantCityFlMember |  |  |
Encumbrances | 2,655,000 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_TrapnellRoadMember / us-gaap_StatementGeographicalAxis = land_PlantCityFlMember | 2,655,000 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_TrapnellRoadMember / us-gaap_StatementGeographicalAxis = land_PlantCityFlMember |  |  |
38th Avenue [Member] | Covert, MI [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Apr. 05, 2013 |  |  |
Number of Farms |  | 1 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_ThirtyEightAvenueMember / us-gaap_StatementGeographicalAxis = land_CovertMiMember |  |  |
Total Acres | 119 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_ThirtyEightAvenueMember / us-gaap_StatementGeographicalAxis = land_CovertMiMember | 119 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_ThirtyEightAvenueMember / us-gaap_StatementGeographicalAxis = land_CovertMiMember |  |  |
Farm Acres | 89 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_ThirtyEightAvenueMember / us-gaap_StatementGeographicalAxis = land_CovertMiMember | 89 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_ThirtyEightAvenueMember / us-gaap_StatementGeographicalAxis = land_CovertMiMember |  |  |
Lease Expiration Date |  | Apr. 04, 2020 |  |  |
Net Cost Basis | 1,303,310 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_ThirtyEightAvenueMember / us-gaap_StatementGeographicalAxis = land_CovertMiMember | 1,303,310 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_ThirtyEightAvenueMember / us-gaap_StatementGeographicalAxis = land_CovertMiMember |  |  |
Encumbrances | 709,487 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_ThirtyEightAvenueMember / us-gaap_StatementGeographicalAxis = land_CovertMiMember | 709,487 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_ThirtyEightAvenueMember / us-gaap_StatementGeographicalAxis = land_CovertMiMember |  |  |
Sequoia Street [Member] | Brooks, OR [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | May 31, 2013 |  |  |
Number of Farms |  | 1 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_SequoiaStreetMember / us-gaap_StatementGeographicalAxis = land_BrooksOrMember |  |  |
Total Acres | 218 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_SequoiaStreetMember / us-gaap_StatementGeographicalAxis = land_BrooksOrMember | 218 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_SequoiaStreetMember / us-gaap_StatementGeographicalAxis = land_BrooksOrMember |  |  |
Farm Acres | 206 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_SequoiaStreetMember / us-gaap_StatementGeographicalAxis = land_BrooksOrMember | 206 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_SequoiaStreetMember / us-gaap_StatementGeographicalAxis = land_BrooksOrMember |  |  |
Lease Expiration Date |  | May 31, 2028 |  |  |
Net Cost Basis | 3,137,348 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_SequoiaStreetMember / us-gaap_StatementGeographicalAxis = land_BrooksOrMember | 3,137,348 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_SequoiaStreetMember / us-gaap_StatementGeographicalAxis = land_BrooksOrMember |  |  |
Encumbrances | 1,640,128 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_SequoiaStreetMember / us-gaap_StatementGeographicalAxis = land_BrooksOrMember | 1,640,128 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_SequoiaStreetMember / us-gaap_StatementGeographicalAxis = land_BrooksOrMember |  |  |
Natividad Road [Member] | Salinas, CA [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Oct. 21, 2013 |  |  |
Number of Farms |  | 1 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_NatividadRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember |  |  |
Total Acres | 166 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_NatividadRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember | 166 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_NatividadRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember |  |  |
Farm Acres | 166 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_NatividadRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember | 166 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_NatividadRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember |  |  |
Lease Expiration Date |  | Oct. 31, 2024 |  |  |
Net Cost Basis | 7,402,759 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_NatividadRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember | 7,402,759 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_NatividadRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember |  |  |
Encumbrances | 3,703,512 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_NatividadRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember | 3,703,512 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_NatividadRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember |  |  |
20th Avenue [Member] | South Haven, MI [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Nov. 05, 2013 |  |  |
Number of Farms |  | 3 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_TwentiethAvenueMember / us-gaap_StatementGeographicalAxis = land_SouthHavenMiMember |  |  |
Total Acres | 151 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_TwentiethAvenueMember / us-gaap_StatementGeographicalAxis = land_SouthHavenMiMember | 151 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_TwentiethAvenueMember / us-gaap_StatementGeographicalAxis = land_SouthHavenMiMember |  |  |
Farm Acres | 94 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_TwentiethAvenueMember / us-gaap_StatementGeographicalAxis = land_SouthHavenMiMember | 94 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_TwentiethAvenueMember / us-gaap_StatementGeographicalAxis = land_SouthHavenMiMember |  |  |
Lease Expiration Date |  | Nov. 04, 2018 |  |  |
Net Cost Basis | 1,856,169 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_TwentiethAvenueMember / us-gaap_StatementGeographicalAxis = land_SouthHavenMiMember | 1,856,169 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_TwentiethAvenueMember / us-gaap_StatementGeographicalAxis = land_SouthHavenMiMember |  |  |
Encumbrances | 1,058,146 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_TwentiethAvenueMember / us-gaap_StatementGeographicalAxis = land_SouthHavenMiMember | 1,058,146 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_TwentiethAvenueMember / us-gaap_StatementGeographicalAxis = land_SouthHavenMiMember |  |  |
Broadway Road [Member] | Moorpark, CA [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Dec. 16, 2013 |  |  |
Number of Farms |  | 1 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_BroadwayRoadMember / us-gaap_StatementGeographicalAxis = land_MoorparkCaMember |  |  |
Total Acres | 60 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_BroadwayRoadMember / us-gaap_StatementGeographicalAxis = land_MoorparkCaMember | 60 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_BroadwayRoadMember / us-gaap_StatementGeographicalAxis = land_MoorparkCaMember |  |  |
Farm Acres | 60 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_BroadwayRoadMember / us-gaap_StatementGeographicalAxis = land_MoorparkCaMember | 60 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_BroadwayRoadMember / us-gaap_StatementGeographicalAxis = land_MoorparkCaMember |  |  |
Lease Expiration Date |  | Dec. 15, 2023 |  |  |
Net Cost Basis | 2,913,225 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_BroadwayRoadMember / us-gaap_StatementGeographicalAxis = land_MoorparkCaMember | 2,913,225 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_BroadwayRoadMember / us-gaap_StatementGeographicalAxis = land_MoorparkCaMember |  |  |
Encumbrances | 1,587,220 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_BroadwayRoadMember / us-gaap_StatementGeographicalAxis = land_MoorparkCaMember | 1,587,220 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_BroadwayRoadMember / us-gaap_StatementGeographicalAxis = land_MoorparkCaMember |  |  |
Oregon Trail [Member] | Echo, OR [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Dec. 27, 2013 |  |  |
Number of Farms |  | 1 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_OregonTrailMember / us-gaap_StatementGeographicalAxis = land_EchoORMember |  |  |
Total Acres | 1,895 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_OregonTrailMember / us-gaap_StatementGeographicalAxis = land_EchoORMember | 1,895 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_OregonTrailMember / us-gaap_StatementGeographicalAxis = land_EchoORMember |  |  |
Farm Acres | 1,640 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_OregonTrailMember / us-gaap_StatementGeographicalAxis = land_EchoORMember | 1,640 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_OregonTrailMember / us-gaap_StatementGeographicalAxis = land_EchoORMember |  |  |
Lease Expiration Date |  | Dec. 31, 2023 |  |  |
Net Cost Basis | 13,974,147 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_OregonTrailMember / us-gaap_StatementGeographicalAxis = land_EchoORMember | 13,974,147 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_OregonTrailMember / us-gaap_StatementGeographicalAxis = land_EchoORMember |  |  |
Encumbrances | 7,407,024 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_OregonTrailMember / us-gaap_StatementGeographicalAxis = land_EchoORMember | 7,407,024 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_OregonTrailMember / us-gaap_StatementGeographicalAxis = land_EchoORMember |  |  |
East Shelton [Member] | Willcox, AZ [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Dec. 27, 2013 |  |  |
Number of Farms |  | 1 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_EastSheltonMember / us-gaap_StatementGeographicalAxis = land_WillcoxAZMember |  |  |
Total Acres | 1,761 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_EastSheltonMember / us-gaap_StatementGeographicalAxis = land_WillcoxAZMember | 1,761 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_EastSheltonMember / us-gaap_StatementGeographicalAxis = land_WillcoxAZMember |  |  |
Farm Acres | 1,320 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_EastSheltonMember / us-gaap_StatementGeographicalAxis = land_WillcoxAZMember | 1,320 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_EastSheltonMember / us-gaap_StatementGeographicalAxis = land_WillcoxAZMember |  |  |
Lease Expiration Date |  | Feb. 29, 2024 |  |  |
Net Cost Basis | 8,099,226 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_EastSheltonMember / us-gaap_StatementGeographicalAxis = land_WillcoxAZMember | 8,099,226 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_EastSheltonMember / us-gaap_StatementGeographicalAxis = land_WillcoxAZMember |  |  |
Encumbrances | 3,544,790 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_EastSheltonMember / us-gaap_StatementGeographicalAxis = land_WillcoxAZMember | 3,544,790 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_EastSheltonMember / us-gaap_StatementGeographicalAxis = land_WillcoxAZMember |  |  |
Collins Road [Member] | Clatskanie, OR [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | May 30, 2014 |  |  |
Number of Farms |  | 2 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_CollinsRoadMember / us-gaap_StatementGeographicalAxis = land_ClatskanieOrMember |  |  |
Total Acres | 200 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_CollinsRoadMember / us-gaap_StatementGeographicalAxis = land_ClatskanieOrMember | 200 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_CollinsRoadMember / us-gaap_StatementGeographicalAxis = land_ClatskanieOrMember |  |  |
Farm Acres | 157 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_CollinsRoadMember / us-gaap_StatementGeographicalAxis = land_ClatskanieOrMember | 157 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_CollinsRoadMember / us-gaap_StatementGeographicalAxis = land_ClatskanieOrMember |  |  |
Lease Expiration Date |  | Sep. 30, 2024 |  |  |
Net Cost Basis | 2,505,615 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_CollinsRoadMember / us-gaap_StatementGeographicalAxis = land_ClatskanieOrMember | 2,505,615 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_CollinsRoadMember / us-gaap_StatementGeographicalAxis = land_ClatskanieOrMember |  |  |
Encumbrances | 1,428,498 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_CollinsRoadMember / us-gaap_StatementGeographicalAxis = land_ClatskanieOrMember | 1,428,498 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_CollinsRoadMember / us-gaap_StatementGeographicalAxis = land_ClatskanieOrMember |  |  |
Spring Valley [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Lease Expiration Date |  |  |  |  | Sep. 30, 2022
Spring Valley [Member] | Watsonville, CA [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Jun. 13, 2014 |  |  |
Number of Farms |  | 1 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_SpringValleyMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Total Acres | 145 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_SpringValleyMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember | 145 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_SpringValleyMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Farm Acres | 110 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_SpringValleyMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember | 110 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_SpringValleyMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Lease Expiration Date |  | Sep. 30, 2022 |  |  |
Net Cost Basis | 5,822,169 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_SpringValleyMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember | 5,822,169 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_SpringValleyMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
Encumbrances | 3,121,532 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_SpringValleyMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember | 3,121,532 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_SpringValleyMember / us-gaap_StatementGeographicalAxis = land_WatsonvilleCAMember |  |  |
McIntosh Road [Member] | Dover, FL [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Jun. 20, 2014 |  |  |
Number of Farms |  | 2 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_McintoshRoadMember / us-gaap_StatementGeographicalAxis = land_DoverFlMember |  |  |
Total Acres | 94 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_McintoshRoadMember / us-gaap_StatementGeographicalAxis = land_DoverFlMember | 94 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_McintoshRoadMember / us-gaap_StatementGeographicalAxis = land_DoverFlMember |  |  |
Farm Acres | 78 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_McintoshRoadMember / us-gaap_StatementGeographicalAxis = land_DoverFlMember | 78 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_McintoshRoadMember / us-gaap_StatementGeographicalAxis = land_DoverFlMember |  |  |
Lease Expiration Date |  | Jun. 30, 2017 |  |  |
Net Cost Basis | 2,572,587 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_McintoshRoadMember / us-gaap_StatementGeographicalAxis = land_DoverFlMember | 2,572,587 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_McintoshRoadMember / us-gaap_StatementGeographicalAxis = land_DoverFlMember |  |  |
Encumbrances | 1,599,600 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_McintoshRoadMember / us-gaap_StatementGeographicalAxis = land_DoverFlMember | 1,599,600 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_McintoshRoadMember / us-gaap_StatementGeographicalAxis = land_DoverFlMember |  |  |
Naumann Road [Member] | Oxnard, CA [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Jul. 23, 2014 |  |  |
Number of Farms |  | 1 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_NaumannRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Total Acres | 68 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_NaumannRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember | 68 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_NaumannRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Farm Acres | 66 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_NaumannRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember | 66 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_NaumannRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Lease Expiration Date |  | Jul. 31, 2017 |  |  |
Net Cost Basis | 6,840,538 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_NaumannRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember | 6,840,538 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_NaumannRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Encumbrances | 3,645,314 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_NaumannRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember | 3,645,314 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_NaumannRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Sycamore Road [Member] | Arvin, CA [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Jul. 25, 2014 |  |  |
Number of Farms |  | 1 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_SycamoreRoadMember / us-gaap_StatementGeographicalAxis = land_ArvinCaMember |  |  |
Total Acres | 326 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_SycamoreRoadMember / us-gaap_StatementGeographicalAxis = land_ArvinCaMember | 326 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_SycamoreRoadMember / us-gaap_StatementGeographicalAxis = land_ArvinCaMember |  |  |
Farm Acres | 322 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_SycamoreRoadMember / us-gaap_StatementGeographicalAxis = land_ArvinCaMember | 322 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_SycamoreRoadMember / us-gaap_StatementGeographicalAxis = land_ArvinCaMember |  |  |
Lease Expiration Date |  | Oct. 31, 2024 |  |  |
Net Cost Basis | 6,413,843 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_SycamoreRoadMember / us-gaap_StatementGeographicalAxis = land_ArvinCaMember | 6,413,843 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_SycamoreRoadMember / us-gaap_StatementGeographicalAxis = land_ArvinCaMember |  |  |
Encumbrances | 3,068,624 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_SycamoreRoadMember / us-gaap_StatementGeographicalAxis = land_ArvinCaMember | 3,068,624 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_SycamoreRoadMember / us-gaap_StatementGeographicalAxis = land_ArvinCaMember |  |  |
Wauchula Road [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Farm Acres | 590 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_WauchulaRoadMember | 590 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_WauchulaRoadMember |  |  |
Wauchula Road [Member] | Duette, FL [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Sep. 29, 2014 |  |  |
Number of Farms |  | 1 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_WauchulaRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember |  |  |
Total Acres | 808 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_WauchulaRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember | 808 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_WauchulaRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember |  |  |
Farm Acres | 590 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_WauchulaRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember | 590 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_WauchulaRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember |  |  |
Lease Expiration Date |  | Sep. 30, 2024 |  |  |
Net Cost Basis | 13,646,802 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_WauchulaRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember | 13,646,802 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_WauchulaRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember |  |  |
Encumbrances | 8,052,525 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_WauchulaRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember | 8,052,525 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_WauchulaRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember |  |  |
Santa Clara Avenue [Member] | Oxnard, CA [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Oct. 29, 2014 |  |  |
Number of Farms |  | 2 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_SantaClaraAvenueMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Total Acres | 333 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_SantaClaraAvenueMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember | 333 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_SantaClaraAvenueMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Farm Acres | 331 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_SantaClaraAvenueMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember | 331 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_SantaClaraAvenueMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Lease Expiration Date |  | Jul. 31, 2015 |  |  |
Net Cost Basis | 24,357,313 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_SantaClaraAvenueMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember | 24,357,313 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_SantaClaraAvenueMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Encumbrances | 13,226,829 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_SantaClaraAvenueMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember | 13,226,829 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_SantaClaraAvenueMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Dufau Road [Member] | Oxnard, CA [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Nov. 04, 2014 |  |  |
Number of Farms |  | 1 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_DufauRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Total Acres | 65 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_DufauRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember | 65 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_DufauRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Farm Acres | 64 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_DufauRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember | 64 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_DufauRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Lease Expiration Date |  | Nov. 03, 2017 |  |  |
Net Cost Basis | 6,105,791 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_DufauRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember | 6,105,791 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_DufauRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Encumbrances | 3,675,000 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_DufauRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember | 3,675,000 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_DufauRoadMember / us-gaap_StatementGeographicalAxis = land_OxnardCaMember |  |  |
Espinosa Road [Member] | Salinas, CA [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Jan. 05, 2015 |  |  |
Number of Farms |  | 1 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_EspinosaRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember |  |  |
Total Acres | 331 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_EspinosaRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember | 331 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_EspinosaRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember |  |  |
Farm Acres | 329 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_EspinosaRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember | 329 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_EspinosaRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember |  |  |
Lease Expiration Date |  | Oct. 31, 2016 |  |  |
Net Cost Basis | 16,817,180 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_EspinosaRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember | 16,817,180 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_EspinosaRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember |  |  |
Encumbrances | 10,178,000 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_EspinosaRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember | 10,178,000 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_EspinosaRoadMember / us-gaap_StatementGeographicalAxis = land_SalinasCaMember |  |  |
Parrish Road [Member] | Duette, FL [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Acquisition Date |  | Mar. 10, 2015 |  |  |
Number of Farms |  | 1 land_NumberOfRealEstateFarms / us-gaap_RealEstatePropertiesAxis = land_ParrishRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember |  |  |
Total Acres | 419 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_ParrishRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember | 419 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = land_ParrishRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember |  |  |
Farm Acres | 211 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_ParrishRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember | 211 land_FarmableAreaOfLand / us-gaap_RealEstatePropertiesAxis = land_ParrishRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember |  |  |
Lease Expiration Date |  | Jun. 30, 2025 |  |  |
Net Cost Basis | 3,908,243 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_ParrishRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember | 3,908,243 land_SecScheduleIiiRealEstateInvestmentPropertyIncludingIntangibleAssetsNet / us-gaap_RealEstatePropertiesAxis = land_ParrishRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember |  |  |
Encumbrances | $ 2,374,680 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_ParrishRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember | $ 2,374,680 us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstatePropertiesAxis = land_ParrishRoadMember / us-gaap_StatementGeographicalAxis = land_DuetteFlMember |  |  |

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- Definition Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e845-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Acquisition Date -URI http://asc.fasb.org/extlink&oid=6919109 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e848-128460 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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